Snapshot
- Ticker: LITE (Nasdaq)
- Bucket: Optics & Networking
- Q4 2025 fund position: $478.6 M (1.30 M sh) — 8.68 % of 13F, #4 holding
- Fiscal year: ends late June
- HQ: San Jose, CA
Business Overview
Lumentum makes optical components and modules for telecommunications, data centers, and industrial / commercial laser applications. Two segments after the FY24 reorganization:
- Cloud & Networking (formerly Optical Communications) — pluggable optical transceivers (400G, 800G, 1.6T) and the laser components inside them, for hyperscaler and telco customers. ~75 % of total revenue and growing fast.
- Industrial Tech — VCSEL arrays for 3D sensing (the iPhone Face ID supplier), industrial laser sources. ~25 % of revenue, more cyclical.
Following the Cloud Light acquisition (closed early FY24, calendar 2023), Lumentum became a vertically integrated transceiver supplier — selling complete 400G/800G modules, not just the laser components. This shifted the company from a pick-and-shovel (laser parts to other transceiver makers) into a direct hyperscaler supplier.
The EML Bottleneck
Lumentum is one of a handful of merchant suppliers of EML (electro-absorption modulated lasers) — the laser type at the heart of every 800G+ datacenter transceiver. EML capacity is genuinely scarce; Lumentum’s Thailand fab expansion is one of the largest single EML capacity additions in the industry and is the source of the FY26 revenue ramp.
Financial Trajectory
| Metric (USD M) | FY22 (Jun-22) | FY23 | FY24 | FY25 (tracking) |
|---|---|---|---|---|
| Revenue | 1,710 | 1,530 (−10 %) | 1,360 (−11 %) | 1,550–1,600 (+14–17 %) |
| Non-GAAP gross margin | — | — | trough ~30 % | recovering to high-30s % by F4Q25 |
| GAAP operating margin | — | — | negative | toward breakeven late FY25 |
| Adj. EBITDA | — | — | — | recovering, ~$200–250 M |
Quarterly Revenue Trajectory
| Quarter | Revenue (~$M) | Notes |
|---|---|---|
| F1Q’25 (Sep’24) | 337 | |
| F2Q’25 (Dec’24) | 402 | |
| F3Q’25 (Mar’25) | 425 | |
| F4Q’25 (Jun’25) | 480 | sharp inflection |
The F4Q’25 sequential acceleration to $480 M is the central financial fact about Lumentum at the time of the fund’s Q3/Q4 2025 build: the cloud transceiver ramp has begun in earnest.
Segment Detail
| Segment | % of revenue | Trajectory |
|---|---|---|
| Cloud & Networking | ~75 % | Growing rapidly on datacom/AI transceivers |
| Industrial Tech | ~25 % | Mixed — 3D sensing (Apple) seasonal; industrial cyclical |
Balance Sheet (~Sep 2025)
| Item | $M |
|---|---|
| Cash + investments | ~900–1,000 |
| Total debt (convert notes) | ~2,000 |
| Net debt | ~1,000 |
| Leverage | elevated until EBITDA recovers |
The convertible-note stack is the legacy of the Cloud Light acquisition financing. Net leverage is high at the trough but compresses fast as EBITDA rebuilds.
Operational KPIs
- 800G transceiver mix: ramping through FY25; meaningful 400G base remains
- 1.6T transceiver: sampling FY25, volume ramps FY26-FY27
- EML capacity: Thailand fab expansion is the single largest near-term capacity addition
- Major hyperscaler supply agreement: announced FY25 — multi-year LPO/CPO and 800G/1.6T pluggables; counterparty understood to be Google or Microsoft (not always disclosed publicly)
Why It Fits the Thesis
The fund’s $479 M Lumentum position (8.7 % of 13F) is the largest position outside the top three high-conviction lines. It expresses the view that:
- Per-rack optics dollar content is growing 3–5× with the GB200/GB300 generation (rack-scale NVLink moves to optical above the rack).
- The merchant-laser supplier base is narrow (Lumentum, Coherent, Marvell-via-Inphi for some components, smaller Asian suppliers) and each generation increases per-bit complexity.
- US-China decoupling pressures hyperscaler buyers to favor US-made optics for some channels.
The 5× sizing ratio over Coherent (the next-largest optics name) signals that the fund treats Lumentum as the cleaner pure-play.
Forward Outlook
Management has targeted **2 B with materially improved margin profile.
Position History in the Fund
| Quarter | Position |
|---|---|
| Q3 2025 | New, large size — top-5 holding from inception |
| Q4 2025 | 1.30 M sh maintained |
Risks
- Hyperscaler customer concentration — handful of buyers control the volume.
- NVIDIA-centric demand cycle — if rack architecture changes (e.g., copper bounces back at shorter reach), optics dollar content could compress.
- Apple Face ID seasonality in the consumer Industrial Tech segment.
- Asian competitor pricing in transceivers (Eoptolink, Innolight) is intensifying.
- CPO (co-packaged optics) transition risk — if hyperscalers move to CPO faster than expected, pluggable transceiver revenue could be cannibalized.
Sources
- Lumentum FY24 10-K
- Lumentum FY25 10-Q filings through F1Q26
- Cloud Light acquisition press release
- FY25 earnings call transcripts (hyperscaler supply agreement)